KR101229448B1 - Powder transferring valve module and operating method of it - Google Patents

Abstract

The present invention relates to a valve module for conveying powder and a method of operating the same, and an airtight unit is provided at a contact portion between the valve disc and the valve body which open and close the flow path while rotating in the valve body, thereby maintaining the airtight state when the flow path is blocked. A cooling unit is provided along the contact portion between the disk and the valve body and the valve disk to prevent overheating of the valve body and the valve disk when conveying powder at high temperature and high pressure. When the valve disk blocks the flow path of the valve body by supplying it to the disk, the high pressure gas is injected into the airtight unit to expand and maintain the airtight state, and the high pressure gas is discharged from the airtight unit to open the flow path for high temperature and high pressure powder transfer. After that, supply the working air to the valve disk flow path according to the rotation of the valve disk This embodiment applies to a series of opening steps is made to occur in succession is possible.

Description

Valve module for powder transfer and its operation method {POWDER TRANSFERRING VALVE MODULE AND OPERATING METHOD OF IT}

The present invention relates to a valve module for transporting powder and a method of operating the same, and more particularly, it is possible to maintain a firm airtight performance when the flow path is blocked, as well as to overcool the overall high temperature and high pressure transport of the powder to provide durability and safety. It relates to a powder transfer valve module and its operation method that can improve.

Expansion seat valves are generally used to transfer various powders to power generation and chemical plants to supply or discharge them to the position required for a specific process. These are classified into dome valves, butterfly valves and gate valves.

All of these expansion seat valves have a structure in which an airtight fluid is supplied to a valve seat provided for airtightness to expand the valve seat and then adhere to the outer surface of the valve disc.

Such an expansion seat valve is widely used in a powder transportation process because it is possible to maintain airtightness even if powder contained in the fluid passing through the flow path exists between the valve disc and the valve seat.

The valve seat used in the expansion seat valve is made of a material such as elastic rubber, synthetic rubber, and the like. Generally, the rubber material is 70 to 80 ° C. and the fluorine rubber Viton material is 150 ° C. or less. Since it is known as a suitable temperature band, it is inevitably limited to transporting powders of high temperature and high pressure in facilities such as power generation, steelmaking, steelmaking, and chemical plants.

When the valve seat made of a material such as rubber or synthetic rubber is damaged under high temperature and high pressure, it may be exposed to fatal dangers such as leakage of fluid harmful to human body and environment.

In particular, in gasification plants, power generation plants, or chemical plants, the supply process of various raw materials, catalysts, and additives, and the discharge of collected char and ash are mostly performed at high temperatures. Due to the lack of localization of the valves, most domestic facilities use very expensive external valves.

The present invention has been invented to improve the above problems, it is possible to maintain a firm airtight performance when the flow path is blocked, as well as to increase the durability and safety of the overall overheating due to the high temperature and high pressure powder transfer can be improved It is to provide a valve module for powder transport and its operation method.

In order to achieve the above object, the present invention provides a valve body having a flow path for conveying powder at high temperature and high pressure in one direction, and both ends are rotatably coupled to the valve body in a direction orthogonal to the flow path such that the flow path A cooling unit configured to cool the valve body and the valve disk heated by the valve disk for opening and closing the valve disk, and the powder formed and conveyed to the valve disk and the valve body in a state where the valve disk seals the flow path. A hermetic unit mounted to the valve body and expanding from the valve body in accordance with the supply of high pressure gas to be in contact with the surface of the dome-shaped valve disk to maintain an airtight state, wherein the valve disc includes the valve body and the valve. Rotating operation by the airtight unit which keeps the airtightness between the discs This embodiment applies restricted is possible.

In addition, the present invention is a first step of supplying the operating air to the first pneumatic actuator mounted to one end of the rotary shaft so that the valve disk of the dome-shaped mounted on the rotary shaft orthogonal to the flow path inside the valve body to block the flow path And a second supplying working air to a second pneumatic actuator for injecting a high pressure gas into the hermetic unit so that the hermetic unit mounted on the valve body expands and closes the surface of the valve disc when the valve disc blocks the flow path. And a third step of shutting off the supply of operating air to the first pneumatic actuator when the high pressure gas expands the hermetic unit by the operation of the second pneumatic actuator, and transferring the powder of the high temperature and high pressure state to the hermetic unit. The injected high pressure gas is discharged to deflate the airtight unit and to operate the air to the first pneumatic actuator side. And a fourth step of rapidly opening the flow path by the rotation of the valve disc, wherein the first to fourth steps are repeatedly performed according to opening and closing of the flow path, and the first and second pneumatic actuators are interconnected by air piping. It is of course also possible to apply the communicating embodiments.

According to the present invention having the above-described configuration, the following effects can be achieved.

First, the present invention adopts a structure that maintains hermeticity by expanding the hermetic unit to adhere to the surface of the valve disc, thereby maintaining excellent hermetic performance compared to general valves.

In addition, the present invention can prevent damage to the valve disc and the valve seat by adopting an algorithm that limits the rotational operation of the valve disc when the airtight unit expands and comes in close contact with the surface of the valve disc, and supplies cooling water to the cooling unit. In addition, the operation error of the valve body can be minimized and durability can be improved.

In addition, the present invention is provided with a series of components including the valve body in the form of a module, it is possible to achieve the above-described series of effects by simply mounting the existing equipment without the need for cumbersome additional work such as extensive replacement or expansion. .

In particular, by applying the overall technology, such as the valve module and the algorithm for the operation of the valve module according to the present invention, the airtight unit including the valve seat can be applied to the process at high temperature and high pressure state, so that high-temperature, high-pressure gas and powder transportation It can be applied to the process of supplying various raw materials, catalysts and additives in facilities such as gasification plant, power plant, chemical plant, etc., as well as can be used for the discharge process of char (ash) and ash (ash).

Therefore, the present invention can replace the super expensive external valves that have been applied to the existing equipment, it will be advantageous in terms of price competitiveness.

Figure 1 is a cross-sectional conceptual view showing the overall structure of the valve module for conveying powder in accordance with an embodiment of the present invention
Figure 2 is a cross-sectional conceptual view showing a state in which the flow path is opened by the valve module for powder transfer according to an embodiment of the present invention.
3 is a block diagram showing a method of operating a powder transfer valve module according to an embodiment of the present invention.
4 and 5 is a conceptual diagram showing a state in which the flow path is opened and closed by a valve system including a valve module for conveying powder according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional conceptual view showing the overall structure of the powder transfer valve module according to an embodiment of the present invention, Figure 2 is a view showing a state in which the flow path is opened by the powder transfer valve module according to an embodiment of the present invention. Cross-sectional conceptual diagram.

For reference, an arrow indicated by a dotted line in FIG. 1 indicates a moving direction of the high pressure gas, and an arrow indicated by a solid line indicates a moving direction of the cooling water, respectively.

According to the present invention, an airtight unit 400 is provided at a contact portion between the valve disc 200 and the valve body 100 that opens and closes the flow path while rotating in the valve body 100 to maintain the airtight state when the flow path is blocked. The cooling unit 300 is provided along the contact portion between the valve disc 200 and the valve body 100 and the valve disc 200 to convey the valve body 100 and the valve disc when conveying powder at high temperature and high pressure. It can be seen that the structure 200 can prevent the overheating.

The valve body 100 is formed with a flow path 500 through which powders of high temperature and high pressure are conveyed in one direction. Although not specifically illustrated, the valve body 100 is connected between pipes for conveying powders of high temperature and high pressure, and transfers the aforementioned powders. It can be said to be a part that stops or continues to operate.

The valve disc 200 is a member that is rotatably coupled to the valve body 100 in a direction orthogonal to the flow path 500 to open and close the flow path, and provides an area in which the airtight unit 400 to be described later contacts. .

The cooling unit 300 includes a valve body 100 and a valve heated by powders formed and transported to the valve body 100 and the valve disc 200, respectively, in a state in which the valve disc 200 seals the flow path 500. It is a collection of members for cooling the disk 200.

The airtight unit 400 is a collection of members mounted on the valve body 100 and inflated from the valve body 100 in accordance with the supply of high pressure gas and in contact with the surface of the dome-shaped valve disc 200 to maintain the airtight state. .

The surface of the valve disc 200 has a dome shape in order to enable fine positioning adjustment, that is, opening / closing degree of the flow path 500 according to the rotation operation, and the inside of the valve body 100 in contact with the valve disc 200. Is preferably made of a hemispherical or spherical shape corresponding to the surface of the above-described dome shape of the valve disk 200.

Here, the valve disc 200 is rotated by the airtight unit 400 which maintains the airtightness between the valve body 100 and the valve disc 200 in order to prevent unexpected opening and closing of the flow path 500 due to a malfunction. It is desirable to be restricted.

The present invention can be applied to the embodiments as described above, it is also possible to apply a variety of embodiments to be described below.

The valve body 100 has a flow path 500 for transporting high temperature and high pressure powders as described above, and the connection body 120 is formed at one side of the valve disc chamber 110 as shown in FIGS. 1 and 2. Mounted, it can be seen that the drive assembly 130 is a structure for mounting the opening and closing operation of the valve disc 200 to be described later.

The valve disc chamber 110 communicates with the flow path 500, and has one side formed in a hemispherical shape in response to an operation of rotating the dome-shaped valve disc 200, and the connection body 120 has the valve disc chamber 110. It is fastened to one side edge of the flow path 500 is a member that the lower side edge is in communication with the flow path 500 on the dome-shaped surface of the valve disk 200 in a blocked state.

The drive assembly 130 supports the rotating shaft 201 extending from both sides of the valve disk 200 and penetrating both sides of the valve disk chamber 110, and the actuator 131 coupled to one end of the rotating shaft 201. It includes, and substantially impart the driving force required for the rotation operation of the valve disk (200).

Here, a part of the cooling unit 300 to be described later is formed in close proximity to the valve disk 200 along the lower edge of the connecting body 120 in order to maximize the structural characteristics and cooling effect, the airtight unit 400 to be described later Is formed along the upper edge of the valve disc chamber 110 for maximum structural properties and hermetic effect.

At this time, the cooling unit 300 is for cooling the valve body 100 and the valve disc 200 heated as described above, as shown in the first cooling assembly 310 and the second cooling assembly 320 It can be seen that the structure comprising a.

The first cooling assembly 310 is formed along the contact portion of the valve disk 200 along the inner edge of the valve body 100, that is, the connecting body 120, and is connected to the valve disk 200 by the injected coolant. The contact portion of the body 120 is cooled, and the second ring cooling conduit 314 extends below the first ring cooling conduit 312.

The first ring cooling conduit 312 is formed inside the valve body 100, that is, the connection body 120, along a portion in contact with the valve disc 200 to form a ring shape, and has a rectangular cross section in the radial direction, and the cooling water. An injection nozzle 311 is provided for injection of the discharge nozzle (not shown) so that the discharge of the cooling water communicates with the first ring cooling conduit 312.

The second ring cooling conduit 314 extends from the inner edge of the first ring cooling conduit 312 to the lower side, and has a right-angled triangle whose cross section in the radial direction gradually widens toward the upper side. It is formed to prevent overheating of the valve seat 410 while being disposed close to the valve seat 410.

The second cooling assembly 320 cools the valve disc 200 and the valve body 100 with a coolant injected through a portion where the dome-shaped valve disc 200 is rotatably supported and injected inside the valve disc 200. By playing a role, it can be seen that the internal cooling conduit 322 and the external cooling conduit 324 are in communication with each other.

The internal cooling conduit 322 is formed by forming a space in which the coolant passes through the inside of the valve disc 200, and the external cooling conduit 324 communicates with the internal cooling conduit 322, and inside the rotating shaft 201. It is formed along the longitudinal direction of the rotating shaft 201 to form a space for the cooling water to pass through.

On the other hand, the airtight unit 400 is to maintain the airtight state in close contact with the surface of the valve disk 200 by expansion by high pressure gas as described above, the valve seat 410 and the gas injection assembly (not shown) It can be seen that it includes.

The valve seat 410 is a valve disc 200 having a dome shape by expanding one side edge exposed from the inside of the connection body 120 by the high pressure gas fixed and injected into the valve body 100, that is, the connection body 120. It is made of an elastic material in close contact with the surface of the contact piece 412, the fixing piece 414 and the engaging piece 416 on each side edge of the contact piece 412, respectively, it can be seen that the member formed sequentially extending.

The gas injection assembly communicates with the inside of the valve seat 410, that is, the contact piece 412, which will be described later, and is mounted on the valve body 100, that is, the connection body 120 so that the high pressure gas is injected, and the cooling unit 300. The first ring cooling assembly 310, ie, the first ring cooling assembly 310, is preferably mounted in close proximity to the valve seat 410, more specifically, the fixing piece 414 and the locking piece 416 to improve cooling efficiency.

Here, the contact piece 412 of the valve seat 410 contacts in a ring shape along the surface of the valve disk 200 having a dome shape, and has a rectangular cross section in the radial direction.

The fixing pieces 414 are respectively inclined in the direction away from each other edges of the contact piece 412 is fixed to the connecting body 120, the locking pieces 416 are orthogonal to each other from the end edge of the fixing piece 414 The member is extended and fixed to the connection body 120.

At this time, the first cooling assembly 310 is formed in parallel with the fixing piece 414 on one side of the fixing piece 414 on both sides of the contact piece 412 to improve the cooling effect as described above.

In addition, the connection body 120 is provided with a mounting protrusion 121 corresponding to the inner space of the valve seat 410 formed by the fixing piece 414 and the locking piece 416, the contact piece 121 is provided in the contact piece At least one gas injection passage 122 communicating with the inside of the 412 is provided to be connected to the gas injection assembly.

Accordingly, the high pressure gas is supplied from the gas injection assembly through the gas injection passage 122 to apply pressure to the contact piece 412 so that the valve seat 410 expands and adheres to the surface of the valve disc 200.

An operation method using a powder transfer valve module according to an embodiment of the present invention having the above structure will be described with reference to FIGS. 3 to 5.

For reference, reference numerals not shown in the drawings refer to FIGS. 1 and 2, and bold arrows in FIGS. 4 and 5 indicate the moving directions of the working air and the high pressure gas, respectively. It is defined as the moving direction of the high pressure gas.

First, in the present invention, when operating air is supplied to the valve disc 200 and the flow path 500 of the valve body 100 is blocked by the valve disc 200, the high pressure gas is injected into the airtight unit 400 to expand the airtight state. And discharge the high pressure gas from the airtight unit 400 to open the flow path 500 for high temperature and high pressure powder transfer, and then supply operating air to the valve disc 200 to rotate the valve disc 200. It is possible to apply the embodiment so that a series of steps in which the opening of the flow path 200 is made in succession.

In the first step S10, the dome-shaped valve disc 200 mounted on the rotation shaft 201 orthogonal to the flow path 500 inside the valve body 100 blocks the flow path 500. The operation of supplying working air to the first pneumatic actuator 610 mounted at one end is performed.

In the second step S20, when the valve disc 200 blocks the flow path 500, the valve seat 410 of the airtight unit 400 mounted on the connection body 120 of the valve body 100 expands to thereby open the valve disc. The operation of supplying the working air to the second pneumatic actuator 620 for injecting the high pressure gas into the valve seat 410 is made to be in close contact with the surface (200).

In the third step S30, when the high pressure gas expands the valve seat 410 by the operation of the second pneumatic actuator 620, the supply of operating air to the first pneumatic actuator 610 is blocked, and the flow path 500 is opened. Be prepared.

In the fourth step (S40), the high pressure gas injected into the valve seat 410 is discharged so that the powder in a high temperature and high pressure state is discharged to contract the valve seat 410, and supply the working air to the first pneumatic actuator 610. As the valve disk 200 rotates, the flow path 500 is opened to transfer the powder.

Here, the first step (S10) to the fourth step (S40) is made repeatedly according to the opening and closing of the flow path 500, the first and second pneumatic actuators (610, 620) are in communication with each other by the air pipe to the second pneumatic When operating air is supplied to the actuator 620, the supply of the operating air is cut off to the first pneumatic actuator 610.

At this time, in the first step S10 and the fourth step S40, the valve disc 200 opening or blocking the flow path 500 according to the forward and reverse rotation of the rotation shaft 201 may be the first pneumatic actuator 610. It is electrically connected to and implemented by a mechanical limit switch 612 to limit the forward and reverse rotation range of the rotating shaft 201.

The mechanical limit switch 612 is preferably mounted on an air line that interconnects the first and second pneumatic actuators 610 and 620.

In addition, in the second step S20, when the valve seat 410 of the airtight unit 400 expands and comes into close contact with the surface of the valve disc 200, the valve seat 100 may be formed inside the valve body 100, that is, the connection body 120. It is preferable that a first cooling process S21 in which cooling water is injected into the first cooling assembly 310 formed in a ring shape in parallel with the forming direction of 410 is performed.

In the second step S20 or the fourth step S40, when the valve seat 410 expands to closely contact the surface of the valve disc 200, or when the valve disc 200 opens the flow path 500, the valve Second cooling processes S22 and S42 for cooling the disk 200 and the rotating shaft 201 may be additionally performed.

In the second cooling process, the coolant is injected into the internal cooling conduit 322 formed in the valve disc 200 and the external cooling conduit 324 provided in communication with the internal cooling conduit 322 along the longitudinal direction of the rotary shaft 201. As a result, the valve body 100 including the valve disc chamber 110 and the valve disc 200 may be cooled as a whole.

Therefore, the behavior of the valve seat 410 and the opening / closing operation of the valve disc 200 according to the moving direction of the working air will be briefly described.

When the operating air is supplied to the valve disc 200 side as shown in FIG. 4, the air pressure for instructing the closing operation is first passed through the main solenoid valve 611 for the operation of the first pneumatic actuator 610. Is delivered).

Thereafter, when the first pneumatic actuator 610 starts to operate, the rotating shaft 201 rotates the valve disc 200 in the direction of blocking the flow path 500, and the mechanical limit switch 612 is configured to completely flow the flow path 500. Sending a signal to limit the rotation of the rotary shaft 201 in the blocked position stops the rotation operation of the valve disk 200, the pressure of the working air is the solenoid for operating the valve seat 410 via the mechanical limit switch 612 It is delivered to the second pneumatic actuator 620 through the valve 622.

Subsequently, when the second pneumatic actuator 620 is operated to supply high pressure gas to the inside of the valve seat 410, the valve seat 410 expands and comes into close contact with the valve disc 200, that is, in a transparent and thick arrow direction. The pressure of the high pressure gas is to be transmitted.

At this time, the coolant is supplied to the valve seat 410 near the valve seat 410 through the first cooling assembly 310 to initiate cooling of the peripheral portion in contact with the valve disc 200.

Thereafter, the high pressure gas is discharged from the valve seat 410 to open the flow path 500 as shown in FIG. 5 (see the transparent and thick arrow direction), and the valve seat 410 contracts to closely contact the valve disc 200. When is released, the working air is supplied to the first pneumatic actuator 610 side through the main solenoid valve 611.

At this time, the first pneumatic actuator 610 acts in the opposite direction to the pressure applying direction in the blocking state of the flow path 500 as shown in FIG. 4 to rotate the rotating shaft 201 to move the valve disc 200 to the flow path 500. In the open state, the coolant is supplied through the valve disc 200 and the rotating shaft 201 through the second cooling assembly 320 to cool the valve body 100 and the valve disc 200.

As described above, the present invention can maintain a solid airtight performance when the flow path is blocked, as well as the overheating caused by the high temperature and high pressure powder transfer as a whole to improve the durability and safety of the powder transfer valve module and its operation method It can be seen that the basic technical idea is to provide.

In addition, within the scope of the basic technical idea of the present invention, many modifications and applications are also possible for those skilled in the art.

100 ... valve body 200 ... valve disc
300 ... cooling unit 400 ... sealing unit
500 euros

Claims (9)

A valve body having a flow path for conveying powder at high temperature and high pressure in one direction;
A valve disc having both ends rotatably coupled to the valve body in a direction orthogonal to the flow path to open and close the flow path;
A cooling unit for cooling the valve body and the valve disk heated by powder formed and conveyed to the valve disk and the valve body, respectively, in a state in which the valve disk closes the flow path; And
And an airtight unit mounted to the valve body, the airtight unit expanding from the valve body according to the supply of the high pressure gas to be in contact with the surface of the valve disk having a dome shape to maintain the airtight state.
The valve body is in communication with the flow path, and in response to an operation of rotating the dome-shaped valve disc, the valve disc chamber having one side is hemispherical and fastened to one edge of the valve disc chamber, and the flow path is blocked. A connection body having a lower side edge in communication with the flow path on a dome-shaped surface of the valve disc;
And said valve disc is restricted in rotational operation by said hermetic unit which maintains hermeticity between said valve body and said valve disc.
The method according to claim 1,
The valve body,
A drive assembly extending from both sides of the valve disc to support a rotating shaft penetrating both sides of the valve disk chamber, and an actuator coupled to one end of the rotating shaft;
A portion of the cooling unit is formed proximate to the valve disc along a lower edge of the connecting body, and the airtight unit is formed along an upper edge of the valve disc chamber.
The method according to claim 1,
The cooling unit includes:
A first cooling assembly configured to cool the contact portion between the valve disc and the valve body with cooling water formed and injected into the valve body along the contact portion of the valve disc;
A second cooling assembly configured to cool the valve disc and the valve body with a portion to which the dome-shaped valve disc is rotatably supported and a coolant injected through the inside of the valve disc,
And the airtight unit is mounted to the valve body in close proximity to the first cooling assembly.
The method according to claim 3,
The first cooling assembly,
A first ring cooling conduit formed in the valve body along a portion in contact with the valve disc to form a ring, and having a rectangular cross section in a radial direction;
A second ring cooling conduit extending from an inner edge of the first ring cooling conduit to a lower side and having a right-angled triangle having a radial cross section gradually widening toward an upper side;
The valve body is a valve module for conveying powder, characterized in that the injecting nozzle and discharge nozzle for injecting and discharging the cooling water is provided in communication with the first ring cooling conduit respectively.
The method according to claim 3,
The second cooling assembly,
An internal cooling pipe path formed inside the valve disc and through which cooling water passes;
In communication with the internal cooling conduit, extending from both sides of the valve disk and formed in the interior of the rotary shaft rotatably mounted to the inside of the valve body along the longitudinal direction of the rotary shaft, and includes an external cooling conduit through which the coolant passes Valve module for conveying powder, characterized in that.
A first step of supplying operating air to a first pneumatic actuator mounted to one end of the rotary shaft so that the dome-shaped valve disk mounted on the rotary shaft perpendicular to the passage inside the valve body blocks the passage;
A second step of supplying operating air to a second pneumatic actuator for injecting high pressure gas into the hermetic unit such that the hermetic unit mounted on the valve body expands when the valve disc blocks the flow path so as to be in close contact with the surface of the valve disc;
A third step of shutting off the supply of operating air to the first pneumatic actuator when the high pressure gas expands the hermetic unit by the operation of a second pneumatic actuator; And
Discharging the high pressure gas injected into the hermetic unit to convey the powder at high temperature and high pressure, and contracting the hermetic unit, supplying working air to the first pneumatic actuator, and opening the flow path by rotation of the valve disc. Including; four steps;
The first to fourth steps are repeatedly performed according to the opening and closing of the flow path, wherein the first and second pneumatic actuators are in communication with each other by an air pipe.
The method of claim 6,
In the first step and the fourth step,
The opening or blocking of the flow path by the valve disc according to the forward and reverse rotation of the rotary shaft is realized by a mechanical limit switch electrically connected to the first pneumatic actuator to limit the forward and reverse rotation range of the rotary shaft.
And the mechanical limit switch is mounted on an air pipe for connecting the first and second pneumatic actuators to each other.
The method of claim 6,
In the second step,
When the airtight unit expands and is in close contact with the surface of the valve disc, a first cooling process is performed in which coolant is injected into a first cooling assembly formed in a ring shape in parallel with a direction in which the airtight unit is formed in the valve body. Operation method of the valve module for conveying powder.
The method according to claim 8,
In the second step or the fourth step,
When the airtight unit expands to be in close contact with the surface of the valve disk or when the valve disk opens the flow path, the air cooling unit is provided to communicate with the internal cooling pipe path formed in the valve disk and the internal cooling pipe path along the longitudinal direction of the rotation shaft. A method for operating a powder transfer valve module, characterized in that the second cooling process is carried out in which the coolant is injected into the external cooling conduit.

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